Thank you Kev;
The reason I asked about the explosive filling hole cover is that John "Jack" Howard, the 20th Earl of Suffolk was said to be attempting to remove the cap when his #17 started running again. So was wondering how uch effort was required to remove the cap from the bomb casing. There were no fins still attached.
Does anyone know a publisher that would be willing to publish Kerin Freeman's book "Jack Howard's War", a complete biography of the 'Holy Trinity' and their eventual deaths?